Science and technology

•January 1, 1970

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FILE - In this March 15, 2013, file photo, a Facebook employee walks past a sign at Facebook headquarters in Menlo Park, Calif. The San Jose Mercury News reports Saturday, March 17, 2018 that building permits compiled by Buildzoom show Facebook plans to erect the 465,000 square-foot (43,200 square-meter) building at its campus in Menlo Park, Calif. (AP Photo/Jeff Chiu, File)